Attachment to polishing machine



March 11 1958 F. s. FAsuLO ErAL 2,826,013

v ATTACHMENT To PoLIsHING MACHINE Filed July 31, 195e v n v 2 sheetsfsheet 1 INVENTORS 594W( 6. Emsa/co By M40/441 cf. A/OU-f March 11, 1958l F. s. FASULO ETAL 2,826,013 v ATTACHMENT To` PoL'IsHING MACHINE Filed July 31, 1956 2 Sheets-Sheet 2 www United States Patent Oliiice 2,826,013 Patented Mar. 11, 1958 ATTACHMENT TO POLISHING MACHINE Frank S. Fasulo, Brooklyn, and William J. Wollt',

East Rockaway, N. Y.

Application July 31, 1956, Serial No. 601,231

2 Claims. (Cl. 51-166) This invention relates to attachments to polishing machines and is herein illustrated as embodied in au attachment suitable for providing lapping equipment.

This application is a continuation in part of the application tiled by Frank S. Fasulo and William I. Wolff on March 19, 1956, having Serial Number 572,505, for a Lapping Attachment.

The ordinary polishing machine is provided with a horizontal shaft carrying a rotating wheel, and when a lapping or line smoothing wheel is substituted for the ordinary polishing wheel, the workman must assume an uncomfortable position over the rotating lapping wheel to be able to see the work piece he is working on even though he views the work piece through the usual radial slots in the wheel.

He gets a good View of the state of the work surface because the open slots pass so rapidly that he seems to be viewing the work piece through the solid wheel. The passing slots serve as a sort of window. Nevertheless, in order to gauge his work accurately he must twist his body into an awkward position.

The horizontal axis of the lapping wheel, however, provides one advantage. It often becomes needful to clean the lapping wheel by cutting off powder and excess polishing materials with a knife held against the revolving wheel, and for that purpose the shaft in horizontal position provides the greatest eiciency.

According to the present invention the foregoing difficulties and` objections are overcome, and a device is provided which enables the workman to tilt the lapping wheel at a convenient angle for working and for viewing the work, and also enables the workman to swing the lapping wheel shaft to the horizontal position to facilitate cutting down the accumulations on the lapping wheel. f

To attain these and other ends the lapping wheel is herein illustrated as carried by a secondary shaft radial to the drive shaft and the secondary shaft is shown as carried in a secondary housing rotatably adjustable around the axis of the driving shaft as by turning on the periphery of a circular plate carried by the machine housing, and as settable either horizontally or at an angle such as 45.

This is readily accomplished by releasing bolts which project through arcuate slots in the secondary housing and may be tightened at will against the circular plate.

Thus it comes about that the horizontal driving shaft may carry the usual polishing wheel without interfering with the use or the cleaning of the lapping wheel.

This simple structure enables polishing and lapping operations to be carried out comfortably and without the need for long preliminary training.

It is easy to eliminate spattering of oil by providing an oil seal where the drive shaft enters through the circulal plate referred to above.

Other features and advantages will hereinafter' appear.

ln the accompanying drawings:

Fig. 1 is a side view, partly diagrammatic, of the device showing the lapping wheel attached;

Fig. 2 is an end View of the same;

Fig. 3 is a face view of a lapping wheel;

Fig. 4 is a sectional view on the line 4--4 of Fig. l;

Fig. 5 is a sectional view on the line 5--5 of Fig. 4;

Fig. 6 is a face View of the circular plate.

In the form shown a prolongation of a polishing machine drive shaft 10 projects from a boss 11 on the cupshaped housing 12 of the polishing machine, and carries a screwed-on extension 13 which projects further and is journalled in the bearing 14 of the lapper-housing 15.

The lapper housing 15 is shown as carried on a closure plate 16 having a central grease proof journal 17 around the shaft 10, and the closure is held to the housing 12, by shouldered bolts 18 rotatable in the bottom of wells 19 so as to draw the closure 16 against long spacing collars or hollow cylinders 20 when the thread 21 of the bolts 18 turns in the threaded sockets 22 in the housing 12.

In the form shown three such bolts appear in Fig. 6. Two at the ends of a horizontal diameter and one at the upper apex. lt is found that three bolts 18 amply steady and hold the parts in the structure shown.

The lapping wheel 23 of felt is shown as screwed on the projecting threaded end of a rotatable shaft 24 journalled in a pair of spaced ball bearings 25, 26, which are carried in a radially projecting boss 27 of the lapper housing 15.

The shaft 24 is shown as driven by the shaft 10 through a metal bevel gear 28 on the shaft 10 which meshes with a bevel gear 29 on` the shaft 24. The bevel gear 29 may be made of liber or plastic to run silently.

The lapping wheel 23 is shown as adjustable around the axis of the shaft 10, and for this purpose the lapper housing 15 is shown as fitting flat against the circular closure plate 16 on its annular face 30 and carrying a peripheral ledge 31 which lies in a peripheral rabbet 32 on the closure plate 16. The lapper housing 15, see Fig. 2 includes two arcuate slots 33, 34, through which pass headed bolts 35 and 36 adapted to be screwed into threaded openings 37, near opposite ends of a diagonal diameter of the closureI plate 16.

After the lapper housing 15 has been rotated on the closure plate 16 to bring the lapping wheel 23 to the position desired by the workman, the bolts 35 and 36 may be tightened in openings 37, 38, to draw the washers 39 down against the smoothed periphery 40 of the housing 15 around each slot 33, 34, and iirmly hold the housing 15 in position. This holds the lapping wheel in any set position.

The lapping wheel 23 is shown as beveled at 41 near its edge and perforated with four radial slots 42 which extend from the periphery 43 to the inner edge of the bevel.

The lapping wheel shaft 24 is shown as formed with a cylindrical portion 44 mostly within the housing 15 and as including a smaller extension 45 held to the portion 44 by a threaded base projection 46 screwed into a threaded end socket 47 on the outer end of the portion 44.

The extension 13 of the shaft 10 is shown as carrying a threaded pillar 47 screwed into the threaded end opening 48 of the shaft 10, and the bevel gear wheel 28 is shown with an enlarged hub 49 extending through the journal 14.

Beyond the hub 49 the shaft 13 is shown with a threaded end socket 50 into which is threaded the reduced end 51 of a shaft 52 which is adapted to carry a Work wheel such as a polishing wheel (not shown).

The foregoing description sets forth a structure 1n which the housing l5 and closure 16 form an oil tight pocket in which the gears 23 and 29 run, and to which the oil and grease may be fed through a threaded bottom opening 53, closed by a threaded plug 54, or can be fed by the threaded side opening S5 closed by the threaded plug S6.

To reduce the smooth iinished area needed on the closure 16 interior, the central area may remain out of contact with the closure plate 16 as shown in Fig. 5 and the boundary of said central area may extend outward near the top as appears at the bolt 1S.

Having thus described one embodiment of the invention, what is claimed is:

1. The combination with a drive shaft adapted to t a polishing head and protrude through the head, said shaft having a socket, of a separable prolongation of the shaft fitting into the socket and having a socket, an adjustable housing, adjustable around a boss on the head around said drive shaft as an axis, a second shaft journalled radially of the drive shaft in said housing, said second shaft having a socket, gears on the prolongation and said second shaft constantly in mesh so that the turning drive shaft drives the second shaft, a spindle on the prolongation filling the end socket and adapted to hold a polishing wheel, and a separable spindle on the s econd shaft fitting in its socket and adaptable to hold a second polishing wheel.

2. The combination with a polishing head of a drive shaft protruding through the head and having a socket, a separable prolongation of the drive shaft fitting into the socket and having an end socket, a plate on said head, an adjustable housing adjustable around the axis of said drive shaft and bearing against said plate, a second shaft rotatable in the housing and extending radially of the drive shaft and having a socket, gears on the prolongation and on the second shaft constantly in mesh so that the drive shaft drives the second shaft, a spindle on the prolongation adapted to t in its end socket to hold a polishing wheel, and a separable spindle on the second shaft itting into the socket and adapted to hold a second polishing wheel.

References Cited in the file of this patent UNITED STATES PATENTS 1,958,734 Woodsmall May l5, 1934 2,133,232 Streby Oct. 11, 1938 2,231,900 Geoffrion Feb. 18, 1941 2,458,840 Eklund Ian. l1, 1949 2,629,210 Robinson Feb. 24, 1953 

